Table 1 Scoping review definition and methodology

“A scoping review or scoping study is a form of knowledge synthesis that addresses an exploratory research question aimed at mapping key concepts, types of evidence, and gaps in research related to a defined area or field by systematically searching, selecting, and synthesizing existing knowledge.” [21]

Stages of the scoping review methodology: [18]

 1. Identifying the research question

 2. Identifying relevant studies

 3. Study selection

 4. Charting the data

 5. Collating, summarizing and reporting the results